Today's mapgl tip for #30DayMapChallenge: Air

Use the `set_fog()` function to change the color of the sky on your @Mapbox map. Visualize the glow of the Northern Lights - or whatever you can come up with!

A custom styling trick for #30DayMapChallenge: Analog

For a "classic" look on your mapgl MapLibre maps, load a parchment paper image (or whatever you'd like) and override the basemap.

Here's how to do it: gist.github.com/walkerke/648...

#30DayMapChallenge Day 7: Accessibility

Today's tip: calculate access from a location in one line of code with `mb_isochrone()` in the mapboxapi R package.

Then, visualize creatively with a comparison slider in mapgl.

Learn how: walker-data.com/posts/time-a...

Interactive heatmaps that fade away to reveal points on zoom - a useful technique for handling dense spatial data.

Learn how to do it: walker-data.com/posts/mapgl-...

Today's mapgl tip for Day 6 of #30DayMapChallenge: Dimensions

Visualize your spatial data in 3D with `add_fill_extrusion_layer()`!

The key is `fill_extrusion_height`; map a column of heights here or use a helper like `interpolate()` to control how you extrude your polygons.

I got a lot of interest in yesterday's geolocation / Overture Maps places proof-of-concept.

I've published the app here for you to try out: walkerke-restaurant-finder-app.share.connect.posit.cloud

For #rstats devs, I've also published the source code here: gist.github.com/walkerke/4a1...

#30DayMapChallenge Day 5: Earth

Today's tip: in #rstats mapgl, use `mapboxgl(style = mapbox_style("standard-satellite"))` to get @mapbox.com high-quality imagery on an interactive globe in one line of code.

Even better - you get 3D terrain out of the box!

Proof-of-concept for an in-app geolocation control:

- Find your location, draw a buffer (or isochrone, etc.) around it;
- Query a massive tileset (64 million places from Overture Maps) to find nearby places;
- Deliver that information to your app users.

Today's mapgl tip: use `add_geolocate_control()` to add a geolocation control to your map.

Click to fly to your location; in Shiny, use `input$MAPID_geolocate` to get the coordinates.

Great for building apps designed for use in the field!

#30DayMapChallenge Day 4: My Data

1.7 million Texas oil & gas wells at your fingertips.

Lasso wells on the map, download the data instantly.

From selection to export in seconds.

(By the way, this is powered by Shiny and #rstats)

311,000+ Texas Land Survey System areas.

Explored over satellite imagery in a single line of code.

Modern geospatial technology can take your land & ownership mapping to the next level.

#30DayMapChallenge Day 3: Polygons

For Day 2 of #30DayMapChallenge (Lines): did you know that mapgl has a built-in measurement tool in its draw control?

Use `show_measurements = TRUE` to interactively measure line distances (and polygon areas) on your map.

#rstats

440,000+ oil and gas wells in Oklahoma.

Intelligently clustered and smoothly displayed on a map with click-to-zoom.

mapgl tip: use `cluster_options()` on a circle or symbol layer, no extra configuration required!

#30DayMapChallenge Day 1: Points

On the blog: building an AI-powered location explorer, updated to Claude Sonnet 4.5!

Learn how to use the ellmer and shinychat R packages to integrate chat into your Shiny apps.

Check it out: walker-data.com/posts/ai-loc...

The 1.4 release of @duckdb.org supports using a DuckDB database to serve vector tiles!

Of course, I had to try this out in R.

Check it out: all 242,000 US Census block groups dynamically served as vector tiles from a DuckDB database, displayed on a MapLibre map from R in Positron.

All 8.1 million US Census blocks.

Visualized smoothly in 3D.

Instant population and housing totals from a lasso selection.

All running seamlessly in the browser, no traditional backend.

While everyone’s talking about AI, it’s an incredible time for geospatial tech.

Most accessibility analyses use "average" travel times.

But rush hour isn't average.

Your "15-minute service area" might be 25 minutes when it actually matters—when patients need care, employees commute, emergencies happen.

Learn how to handle this: walker-data.com/posts/time-a...